XML 198 R170.htm IDEA: XBRL DOCUMENT
v3.20.4

Preferred Shares - Preferred Share Series Information (Details) - Preferred Shares | 12 Months Ended
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Dec. 31, 2020 $ / shares
Disclosure of classes of share capital [line items] |
Fixed rate reset term | 5 years
Amount per share redeemable at reset date | $ 25.00

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount Per Share Redeemable At Reset Date + References No definition available. + Details
Name: | tac_AmountPerShareRedeemableAtResetDate
Namespace Prefix: | tac_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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- Definition Preference Shares Fixed Rate Reset Term + References No definition available. + Details
Name: | tac_PreferenceSharesFixedRateResetTerm
Namespace Prefix: | tac_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_PreferenceSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |